{"id":398679,"date":"2025-09-05T01:10:20","date_gmt":"2025-09-05T01:10:20","guid":{"rendered":"https:\/\/www.europesays.com\/uk\/398679\/"},"modified":"2025-09-05T01:10:20","modified_gmt":"2025-09-05T01:10:20","slug":"249-decibels-this-record-breaking-number-has-nasa-scientists-worried","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/uk\/398679\/","title":{"rendered":"-24,9 decibels: this record-breaking number has NASA scientists worried"},"content":{"rendered":"

At first glance, total silence might sound peaceful\u2014even meditative. But step into the anechoic chamber at Orfield Labs in Minneapolis, and that illusion quickly fades. At -24.9 decibels, it holds the world record as the quietest room ever created\u2014and the effect on the human brain is anything but calming.<\/strong><\/p>\n

Inside, silence becomes overwhelming. Visitors report hearing their heartbeat, lungs, and even digestive gurgles with unsettling clarity. In this space, where sound is stripped away, your senses begin to rebel.<\/p>\n

What exactly is an anechoic chamber?<\/p>\n

An anechoic chamber<\/strong> is a masterpiece of acoustic engineering. \u201cAnechoic\u201d means \u201cwithout echo,\u201d and that\u2019s exactly what you\u2019ll get\u2014no outside noise, no reflected sound, just deep, unnatural quiet.<\/p>\n

Walls, ceilings, and floors are covered in pyramid-shaped acoustic foam that absorbs sound across all frequencies<\/strong><\/a>. The floor? It\u2019s a suspended wire mesh to prevent reflection from below. Even the ventilation system is silent. And to keep external noise out, a double-door system seals the chamber like a vault.<\/p>\n

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-24.9 decibels: world record for the quietest place. \u00a9 piranka, iStock<\/p>\n

According to physicist Andy Piacsek, everything in the room\u2014from shape to structure\u2014is built to make sure no sound escapes or enters.<\/p>\n

The science\u2014and strain\u2014of perfect silence<\/p>\n

The Orfield chamber\u2019s -24.9 decibel measurement is lower than the threshold of human hearing, which starts at 0 dB. That means it\u2019s quieter than your brain is wired to handle.<\/p>\n

Steven Orfield, the lab\u2019s founder, often challenges people to sit in the chamber. \u201cThe quieter it gets, the more you hear what\u2019s inside your body,\u201d he says. \u201cYour heart, your breathing, your stomach\u2014it becomes your entire soundscape.\u201d<\/p>\n

Neuroscientist Kevin Sitek explains that our spatial perception relies heavily on ambient sound. Without those cues, the brain becomes disoriented, leading to:<\/p>\n